Crank-twisting machine



Oct. 21,1930. T. SHAW 5779,017

. CRANK TWISTING MACHINE Filed March 14, 1927 7 Sheets-Sheet 1 Oct. 21, 1930. I T. SHAW 1,779,017

CRANK TWISTING MACHINE Filed Ma rch 14, 1927 v Sheets-Sheet 2 INVENTOR. fZ amas 53am A TTORNE Y.

Oct. 21,193 T; SHAW 1,779,017

CRANK TWISTI NG MACHINE 4 -Filed March 14, 1927 7Sheets-Sheet 3 I N V EN TOR.

1 5027746 flaw.

A TTORNE Y.

Oct. 21, 1930. sHA'w 1,779,01 7

CRANK TWISTING MACHINE I INVENTOR. 7% 077745 flaw AZ Jaw A TTORNEY Oct. 21, 1930. T] SHA 1,779,017

CRANK TWISTING 'MACHINE Filed March 14, 1927 7 Sheets-Sheet 5 INVENTOR. ,mamda 624w.

Maw

A TTORNE Y.

Oct. 21, 1930. .T. SHAW ,017

' CRANK TWISTYING MACK-{INE Filed March 14, 1957 7 Sheets-Sheet e Oct. 21, 1930. T. SHAW CRANK TWISTING MACHINE 7 Sheets-Sheet 7 Filed March 14, 1927 INVENTOR. ,7 fi0ma6 fiaw I ATTORNEY.

Passed Oct. 21,1930

; Ham

TIaoMAssI-IJAW or iQANsING, MICHIGAN,

- LA SIN Mien-lean, a oonroaa'rlon on MICHIGAN T on-anx rwis'riiie MACH- nn r {JApplication filed March 14, 192% Serial away a This inventionrelates to crank twisting;

niachine and has to do particularly, with novel mechanism. for gripping and (twisting the various throws of multiple throw crank positioned in the same plane,

positively matically uncapping the twisting block in? returning'the sam'elto position to present shafts ofthe type utilized in internal'com bustion engines.

In the. forming f r as shafts withmul-. tiple throws positioned at various degrees of angularity it has been found expedient all the throws and to subsethrows. V to, their Y to forgethe crankshaft with quently twist the various proper angular positions. Heretofore inlthe twisting of crank shafts having the throws forged in the same plane, it has been ue-5 tomary to first clamp the shaftinto posi-u tion and then by subsequent Toperations to twist the. variousv clamping inei'nbers and then manually release thejclamping members while in their twistedposition in order to disengage the twistedshaft from the machine. It has heretofore been found necessary align and stralghten'up-thevarious parts of the shaft. The machines :oftheprior art? for accomplishing this twisting havehere I tofore been relatively heavy and'somewhat cumbersome in operation inaddition to re-; quiring arelatively, long time to perform the necessary operations and al'so, due to theidesign of the twisting apparatus, pre-' sented manysmall inaccuraciesbecause of, the wear of many of the necessary parts. 7-

It is the object ofjthe presentinvention to provide a compact and wholly automatic,

machine for gripping and automatically and tWlSblIlg the twisted shaft complete without the necessity of restriking or reforming. f I

further object f this invention has -to I do with the provision of" novel mechanism for automatically and positively looking a twisting block and the caps thereforin various positions of operation whereby the crank is first positively clampedin the "dies; each torestrike or retrim the fforged'gand twisted crank 'shaftin order to '.accurately whereby" such f positioning the forged shaft in block, twisting the various throws of; the crank. about fixed centersand autol the cradles.

partthereof being firmly I the' facesof the'dies', the clamping and twist-, -1ng blockbelng positivelyljockedj until the operator'can release the locking mechanism vBy releasing the lockingmechanism} the twisting block is operated to, twist the va rlous throws-into-the'ir final aligned positions' at which" time p the various twisting:

blocks are again-positively locked, making it impossible for the operator to attempt .to return the twisting blocksito their nor? f lmal lp'ositionswithout unlocking the locking? m echanis1n.- if l he icaps of the twisting blocks may then be released, the locking mechanism unlocked andthe QU unc pp d i blocks returned ormal-Position with l ne automatic operation.

nssieivon seams" Dnor FoRGEooQoE ,A n 0ther important feature of this inven tlon resides in the provision of a crank twist- 'ing machine which is readily adjustable to accommodate crank shaftsofvarioustypes such as four-bearing. and '7 seven-bear ng crank shafts and six and: eight-throw, crank shafts, the adjustments being attainedfby ustingr orjparts of" the machine only fixed spaced pivots pivots l.

These be brought out in the specification and claims and other novel features which will" V majorj'p'arts operate about or" about fixed aligned are accomplished by a novel'mechan'ism which" includes a frame, to the; bottom ends'of which are pivoted two oppositely positioned proximately axially pivoted cradles} These; cradles are adapted to be'oscillated by means but ap-'- I v ,5 of various links-and leVeIS WhlCli links and levers areactu'ated by power means distribuf" ted by means of'two shafts mounted loii'gitu;

dinally in the upper-part of the frame. 7 The various twisting blocks areiconnected 'd ire'ct plished' by means of links positionedbetween.

the levers and the caps of the twisting blocks," I p p I while I the i automatie locking: of the twisting 1 IV or indirectly to these operably' positioned F g. 21s a cross sectional plan view tak n blocks before and after actuation is accomplished by locking mechanism attached to the cradles, and where four-bearing six-throw cranks are to be twisted by additional lock ing means connected to the members for twisting the endshaft bearings into position.

In the drawingszj 1 Fig. 1 is an endelevation of a device embodying my invention and showinginpan ticular thegeneral arrangement of the frame, the-positioning of the cradle members and "the location and positioning of the :shaftsfor" carrying and operating the levers and links for actuating the twisting blocks and the cradles; Q

on the line through the bearings for thecra d les;of Fig- 1, and illustrating-in particular the positioning of a six-throw four bearing" crank shaft in thebottom dies of the 'respective twisting blocks, and also showing the manner of adjusting the twisting blocks for twisting the main front and rear bearings. Fig.3 is a vertical longitudinal'sectional view taken on line 3-3 of Fig.1 through V the center of the bearings for supporting the ment'with thecentershaft bearings Attention is'called to 1 which-shows this twist- 1 ing block in open position.

' shows the locking mechanism from the re verse side, the cradlebeing. moved to its op- V on line 88 of Fig. 3 and illustrating the clamping block for positively clamping and i 'Q holding certain fixed cheeks and'crank b,ear-' fniain cradle, and illustratingthe manner of supporting the cradles, and also illustrating the'manner offpivoting the twisting block caps to the bottom of the twisting blocks, and I the manner of connecting thetwisting blocks tothe cradles.. '7 l r r Fig. 4: is a detail view of the. bearing block Y and linkage-for. twisting the front and rear" main -;bearings of the four-bearing I crank shaft, the twlstlng block belng shown 1n its finaltwisted and locked position,the main end bearing having beendrawnup into aligne Fig. 5 is a detail View of the twisting block and. the connecting lev ers for "twisting the end crank bearings and the long cheeks, the

normalposition, of the links being shown indotted lines, and the position of the cheekand crank bearing being shown 7 before and after twisting,in dotted lines.

F'g. 6 is a detail view of the lockingmechanism for automatically lockingthe cradles 1 attheends of their path ofmovement. I

"Fig. 7 is a view similar to Fig. 6 which posite position. V ,y i Fig. 8 is a fragmentary detail viewtaken .ingsdn position during twisting, and illustrating the manner of moving the link past dead center topositively clamp the shaft into position. 7 p p ,Flg. 9 1s a diagrammatic view Illustrating the "manner of twisting the long cheek and crank center 30 about another crank center and then twisting the end cheek and end bearing 30 about the fixed crank center positioning the end bearing in axial alignment. with the center shaft bearing. I

ing block which isindividually "carried by Fig. 10 'sja detail View of the'centraltwist- 7 one of the cradles, the twisting block being shown in. elosedlposition clamped against a portion of the crankshaftshowing the lock ing link for positivelyclamping the cap of [the twisting block into the crank shaft just before and after being in its locked position.

" Fig. 11 is across sectional plan vview, partiallydiagrammatic, and'similar to Fig 2,

illustrating the adaptation of my device for theitwisting of a seven-bearing six-throw crankshaft, adjusted into axial alignment. y

The pr ferred general tructure of a frame for carryingand permitting operationof the" various units going to make up my novel 1 twisting apparatus, is best shown in Fig.1

andmay'be generally designated 1. Most of the twisting apparatus is left oftin'thi's fig vure forvthe sake'of clarity. I The frame structurepreferably comprises a base structure2,

th'ecenters of the 'cradl es being as'shown in Figs; 1 and 3,-'and suitable up- Fig. l, but the bottomparts of'the two end: frames are;clearly shownin Fig. 2 and may be designated 9] and .10. The longitudinal top center bar for-connecting the end frames is provided at points near the center thereof with two downwardly-extending bosses 11,

these bosses being adapted'to serve as fulcrum and pivot points for operating levers for the fixed clamps, to be laterdescribed. It will be understoodthat the end frames at each end of the general frame structure are provided with suitable web sections between the upright andhorizontal flanges, but for the purpose of clarity these end frames are assumed to be formed on the upright ends of vertical andhorizontal flanges so as to show the various members in solid lines. V

The bottom portionof. each end names and 10 is providedwith suitable journaled' pivoting and power trans 30f theframe are connected llm hearing membersl12 and 13 which are adapted to be the main journals or trunnions of the 'twristing' app'aratu'sl Thesebearings are clearly shown in Figs.'2 and?) and are adapted to receive suitable stub shafts l land 15 forming the supporting and pivoting means for asuitable cradle 16. This cradle being best shown inFigs; 1; '2 and 3, Fig.3

being taken on line 3-3 of Fig.1 and looking in the direction of the arrows. The

heavier sections ofthe end frames9- and 10, i v as shown in Fig. 2, are adaptedto adjustably support suitable members 17 and18, which are 'apertured'as at 19 and 20, for receiving suitable stub shafts 2lj'a nd 22 which are secured 'tofar'ms 23 of another cradle member 241-,as'clearly shown in Fig. 2. i The members 17 and 18. are'adjustable' relative to the-end frames 9 and'lO wherebythetrunnions 21 and 22 may. be-adjusted' relative to the maincenter defined by the trunnions 14 and 15, or may be adjusted to axially alig'n'with said main cen-' ters. It willtherefore be obvious from Figs.

1, 2 "a nd'S that'l have-provided two oppositely disposed cradle members which are journ'aled -ato the extreme ends of the main frame and ontrunnions which areeither in axial alignment or in spaced alignment.

The cradle'member 16 has secured there to as-bestshown in'Figs. 2,3 and 10, a'suit-' able crank twisting; member which may be designated 26. This crank twisting member comprises a sultable base member which is.

provided with a suitable arm 27 for rigidly securing the same to the cradle; The crank tWlStIIlg member 26 is divided into two"parts,' one being the base member 2'; and the other bein the ca 28 which is )lVOtXlitSfitjQ to the base member. The cap 28. is prefer-- ably formed as the upper part of a die for clamping and twisting a certain 'partof the crank shaft, while the 'basemembe'r 27 is" preferably provided with suitable tapered "grooves and filler blocks forreceivingthe;

separate bottom partof thejdiejgO. A clamping and twisting lever 31 is pivoted, as at 32,

tothe base member 27 and preferably directly below the'twisting center of the twist ing'member, and the'otherfend of; this lever 31 is pivotally connected by means of alinlr 33 to the cap- 28. The base member 27 is \1 preferably formed of two" spaced brackets or arms; as shown in Figs. 2 and 3, and 'the lever 31 is adapted tomove'between' the spaced arms 27, as is well illustrated in Figs.- 1 and 10, the arm 31in Fig. 1 being in its downward position while in Fig. Fbeing approximately in its clamping position. lever 31 is adapted to be actuatedby a suit: able/link 84L connecte'd' by means-of a lever 35 directly to the shaft? andkeyed thereto. It will be obvious from-Figsjlfand 10 that when the'lever 31 is in its down position that the cap 28 will be swung; upwardly from the lower die member 30. As the lever r 31'is moved upwardly the cap 28 will be closed, as shown in Fig. 10, without IOVQ- ment of the cradle 16 which is at this time locked as will be later described, Continued upward movement of the arm 31 will force thelink 33 pastor at its dead center I to positivelyforce the cap 28 into clamp bering the bearings and cheeks in order from that if the link elais 'moved to theleft; ias

. viewed in Fig. 8," that the link 40 willibe uning position, and thus positively forcing the crank shaft into its position in the die. The

' lever 31*at this time will havebcen oscillated to a point whereit will strike the base member 27 wherebywhefn the cradle'is uir- 31' will serve to oscillate theentire'i twisting 'member' together with the'cradle 16," about the cradle trunnions which areindi-f mot alignment with the'bearing o f-the. shaft about whiehthe particular part-of the crank; is thenb'eing-twisted. 1 y I9" l I It may be well at this time to describe'th e parts'and 'o-peration of thisdevice asfa'dapt ed to afo ur-bearing six-throw crank shaft; 5

and'in Fig.2 ilhave illustrated such a crank shaft in positioniii thelower diemembers of the respective twisting members. 'Num ed. As above described,the'bearing member;

27 and the cradle 16 are adapted to ice-oscil- .lated aboutthe trunnions 14 and 15, which are inralignment with the shaft bearings C w'herebythe cheeks B andthe crank bearings A are twisted to an angle of 1 V In'the operation of my device thetcheek member 5D and the crank bearing E are adapted to be held stationary and .to this end I have provided suitable standards'g'l which are rigidly secured-to the base of the, v

frame '2, and which rigid standards carry 1' V a suitable bottom'die38 and cap member 395.

which cap-'inemberand die, are adapted to clamp-the cheek member Dfiwhereby the cheek B maybe oscillated'about the'shaft' bearing 6, and the cheek member F about 5 the crank bearingll. Thecap-member 39 is connected by me'ans of a suitable lock ing link 40 to a link 41' which is adapted to be connected directly to the bearing meme I ber 11, shown in Fig. 1,.alnd a suitable link 4;

and lever (not shown) freely connect this link e l'with theimain shaft a main level" being providedj for oscillating the link-41 j about the" bearings 11. 5 It will'be obvious locked and the cap39jrais'ed to permit. re-' movalof-the crank;-whi'le if the link 41' is moved to the=right,-the-lin'k4O wilhbe moved'to upright locking position asshown, 1 5:0

lockedlthe continued movement ofthe lever i and parts oftheshaft firmly forced into "by means ofan arm 44 which forms also the base memberfor receiving thebottom'part of they twisting Ldie- The base member 44 is provided with; asuitable bearing for pivotally carrying the cap 45. A lever 46 and 'link47 are pivotally connected tothe base 44 andithe cap 45 similar to the connection;described. with reference to the twisting mem ber 27. A suitable-link 48serves as a connecting-means between the lever 46 andthe lever 49 keyed .to the shaft 6. The cradle inember24 is-pivotedabout the trunnions 21 and'22 in direct axial alignment with the crank bearings E, and it will be obvious'that upon actuation of the lever 49 that the lever 46 will beinitially moved to close the cap 45 andmove the link 47 past or at dead center to lock the same in position, and continued movement of the lever 46 will move the entiretwisting member 43 together with the cradle V '3 p 24 about the centers 21 and '22 to twist the cheeks F about the centers formed by the crank bearings E. Itwill be understood 'that this twisting of the cheekF and the hear ing G will bring thecrank bearing G at an angle of 60 from the main center of the crank shaft, aswill be clearly obvious from Fig. 5.

of the: structure best illustrated in Fig; 4. The twisting member may bedesignated 50, and instead of being rigidly connected to the cradle24, it is slidably and pivotally connected to the arms 23 of said cradle. The partially diagrammaticviewshown in Fig. 4 is. .preferably'taken at the up er"end of the;

frame, as viewed from Fig. 2, but itwill be seen that such twisting member 50 comprises suitable arms 51 which provide a suitable ex tension and bearing 'member'52 for engaging the arms 23 of the cradle 24. These arms23 are provided with a suitable slidable mem ber 53 carrying suitable pins 54 and 55', the pin 54 being adapted to pivotally support the twisting member 50 about the point 54 which 1 is in alignment with the shaft bearing G after it'has been twisted to the position shown in" Fig. 5. The pin 55 is adapted to engage a suitable slot .56 formed in the twisting member 50. i The twisting member 50is adapted to slidably' engage the bearing member 43 r (soandto beguided thereby by a suitable pin and slot connection 58, the slot being preferably wider than the pin to'permit relative adjust ment'between the two twisting members. ,The

.member 53 forcarrying the pins 54 and 55'is adjustable in the arm23 wherebythemachine The twisting of the cheeks H and the main end shaft bearings is accomplished by means will accommodate cranks having throws ofv varying radius. It will thus be seen that the movement of the cradle 24by means of the lever 491Will cause movementjofthe twisting member 50 by reason of the pin 5 5 engaging the top part of the slot 56 regardless ofyany movement of the twisting inember fiO'of it-- J. downwardly about the; center formed by" thebearing E. lnaddition'to this, however,

the twisting memb'en 50 is providedj'with a lever 6O which'is connected to theca-p.61 in the manner. heretofore described, and this lever'6O is connected by means of suitable cured to the shaftf; The shaft 7 is connected by means of the lever .66 (see-Fig. 1);, the link 67 and lever 68, totheshaft-G whereby movement of the shaft 6 will move the shaft' 7 and by its connected linkage move thelevers (see Fig. 4) and 27 (see Fig. 10) 60 about the-centers of and on the cradles. It will thus be obvious that upon movement ofthe shafts-6 and 7 that the levers 6O will j move the "twisting members 50 sixty degrees, or thirty degrees in addition tothe movement ofthe twisting member 43. By referring to Fig. 9, the action of the two twistingmembers 43' and 50 willbe more clearly obvious, the twist-. ing member 43 serving to twist cheek F 30 about'the center E, and the twisting inember V 50, disregarding the lever 60, serving totwist the cheek H and center J in alignment with I the cheek F. However, by bringing in the action of the lever GO'andthe pivoting of the twisting member 50 aboutthe pin 54, which is in alignment with the bearingG', it will be obvious that thecheek. H and center J will be;

twisted 30further or up into alignment with .the main shaft of the crank.

i The actuationof all'the twisting devices is accomplished by means. of a-single actuat-' ing lever 70 which may be connected to any suitable source of. power. The rigidjorsta tionary clamping members '37 on either side of the center twisting member 27'areprefe:

erably closed by meansofj a lever fulcrumed on' the shaft connected to lever fulcrumed on a shaft in the bearings '11. Thisstationary clamp actuatinglever maybe automatically actuated simultaneously with the lever 70, or before or after. actuation of e-111e,.

ver'ZOf:

. As best shown in Figs. 6 a'nd'T, suitable locking devices 75' are mountedonthe base 2 of the frame and so positioned as {to en-{' gage the cradles 1:6 and24. The figures show:

a front and rear view of the locking devices;

as connected to the cradleil6,'but it willbe understood that a similar'device issecured to the opposite cradle 24. This locking device 7 75 consists-of a standard slottedas at76;to

receive an adjustable member 77 through which extends a shaft 78. To one endof 80 links 62, 63, and 64 to a lever 65 rigidly sea be obvious,

to which is connected a suitable piston 83' Suitable actuation of this" of a cylinder 84. cylinder and piston 83 will actuate the shaft 7 8 to break the locking connection 8l,whereby the cradle may be moved. It will thus referring to Figs. 1, 6 and 7,

that the cradle members 16 and 24 will be automatically locked whenever they assume their downward position or their upward position, as illustrated in dotted lines in nections may be broken by means of a suit suitable crank shaft may be placed in the. bottom diesas shown inFig; 2. Suitable ac-.

Fig. 1. This locking of thecradles in downwardor upward position may beibroken by suitable actuation of the" pistons 83. I have also provided suitablelocking mechanism which may be generally designated 90,

which consistsof anarm secured to the cradle r 2d at each end thereof, said armhavin-g pivoted thereto a lever 91, and said lever being connected to the twisting member by means of a link 92, a suitable locking connection 93': being provided betweenthe lever 91 and link 92. As will be obvious fromvFigs, 1 and 4 this locking arrangement between the levers 91 and 92' will take effect WllGIlbh! cradle 24 and twisting member 50 are in their uppermost positions, or whenthey are in their lowermostpositions, andsuch locking conable link 94 connected at'any position .convenient to the operator.

Inoperation the ca s ofallthetwisting members and the two stationary members'are open, as shown in Fig.1, atwhioh time a tuation of the mainlever for movingthe stationary clamping lever 41, and suitable actuat'ion of the main lever by hydraulic or other i means will, as best illustrated inFigs 8 and position and thus positively force the 'iorge'd: v crank into position againstthe surfacesfof' I the bottom dies.

ing in their lowermost position,'as shownin Fig.1, will be locked againstfmovement by* 10, move the stationary clamping caps 39 and the clamping caps of all the twisting members automatically into position without actuating either of thejcradles, Continued move- 'ment of the main actuating lever will position the various links'33 and {LO etc, whereby V they will assume a position at or 'past 7 dead center to v positively force; all the: caps into Thecradles Y16 and 24 be the locking devices 7 5, the samebeingtrue of the levers60; The operator willfthus be prevented from twisting the crank until all the caps have been securely fo'rced into post tion. Pressure of asuitable lever or operat- 7 ing means will then release the locking mechanism whereby the variouslevers' '31,' 60, etc

are further moved to actuate the twisting member and .to simultaneously 'carryalong the cradles 16 and'2 l whereby'the various twisting members will oscillate about the cena 'ters as heretofore described; The bearings} C will remain stationary, the bearings and cheeks B will be twisted 6 0 upwardly, the

cheeks F and bearings G will be twisted- 30 downwardly aboutthe center E; and the cheeks H and end bearings J will thenfbe twisted 30 upwardly,as' illustrated in Fig. 9. After the twisting operation the cradles and 24, asiwell as the twisting member 50,

will be again locked in twisted position. The

leversj7O may then be reversed as wellgas the lever for the stationar-yjoaps whereby all the caps may be moved upwardlywhile the lower part of the twisting' members are tin twisted position. Theshaftmay then. be 'p'arti'ally disengaged from the diesg the lockinf'g devices disengaged and the levers Q continued inmovementwhereby thefop-en caps be emovedfromthe machine. V 'A further man er of operating; my device is shown inFig.v 11 in which casejthe machine andthe bottom portions of the twistingmem-q j ber's are'alljmovedtonormal horizontal and: open position, at which time the shaft may i is adjusted to twist-a seven-bearing'siX- throw crank shaft where all the throwsand cheeks are equi-distant from thecenter. In 'thi's'case' the member t 21 is inalignment with the 'mainbeari'nglf) whereby. both cradles will oper'ate 'aboutjthe same longitudinal'axis When thelmac'hine is adjusted V crankshaft it will be understood thatfth'e' link 62 may be disengaged whereby'the twist 17 is adjusted until the bearing to twist] such a seven-bearing 1 ingmemberBO willonlyo-perate through'an j arcfof 30 and about'theibearing21; In such a condition the die members aswell as the caps of the twisting members will beremoved,

the bottom die members being slid'horiz'ontally and other die members 'insertedyasf shown in Fig; 11', whereby the 'va'rious'crank bearings may be twistedabout-the s erb t afvery simple andcompact machine for twisting crank shafts,"the majorparts of which are adjustable to twist either a seven-bearing or'four bearing"crankshaft. It"will"further V p be obvious that forftwisting a'neight-throw F V crank the center stationary clampsm'ay be removed andfeach set of bearings may I 11. In a" crank twisting machine; cfrank lngs; q ,v v I It will thus be obv ous that' lhave provided wi t n m m i omp ifla blebk; o m i 915a W n C p 'pirqtedf h etb r c am portion of the' crank into positionprer r i ia eazae -i ean rlr d said cap and movableabjouta on said base for closing the cap and actuatingthe twisting means. a 2. In a crank twisting device for twisting cranks of multiple throw shafts, a twisting block for twisting certainbearings about fixed bearings, comprising abase and a cap for said base for clamping the shaft into place preparatory to twisting, and a single operatlv'e member pivotally connected to said. base and said cap for positioning the cap on the'base and oscillating said twisting block. f "3. In a crank twisting device for twisting cranks of multiplethrow shafts, a twisting fixed bearings, comprising a base and a cap block for twisting certain bearings about fixed bearings, comprising a base mounted to oscillate about an axis in alignment with said fixed bearing and a cap for said base for clamping the shaft into place preparatory to twisting, and a single means movable in a continuousoperation to close'said cap in the first part-of its movement and actuate .said block injthe second part. of its 'movement.

4. Ina crank twisting device for twisting cranks of mult-iple throw shafts, a twisting block for twistingv certain bearings about for said base for clamping the shaft into place 7 preparatory to twisting, and means pivotally connected to said base andto said cap and movablein a continuousmovement to close the cap, positively move it into lockclamping position, andactuate the entire blockto twist aportionxof the crank shaft. V

5, A crank twisting device, comprising in combination a plurality of, crank twisting membersfor gripping difl'erent'parts of the crank,.and twisting such parts about fixed bearings, and oppositely positioned and movablecradles one of which extends substait tially the length'of the crank and supports apluralityof twisting members, the. ends of the cradles being mounted 'oncenters. in

tivefixed bearings. 1 ,i a 6. "A crank twisting device, comprising'in combination a pluralityr of crank ,twisting members for gripping differentparts of the crank, and twisting such parts about fixed axial alignment with the axes'of the respecbearings, oppositely positioned and movable cradles extendingthe length of and support; ing the twisting members, the .ends of the cradles being mounted [on centers in axial alignment with the axes of the respective fixed bearings, and actuating means {connected directly. to said twisting members, said -means "being adapted to close "the twisting members and clamp the crank in the firstpart of its movement,and to actuate thetwisung members together,

' second part of-itsf movement. 1 T L 117. "A" crank twisting? device, comprising in V combination a' plurality-Q, or; crank. twisting s members forgrippingfdijlferent pa'rtsiofthe cranlgij and twisting such parts about fixed withYthe'flcradlesi the bearings, oppositely positioned and mevable cradlesextending the length of and supporting the "twisting members, and actuating 7 means directly connected. to said twisting members adapted in one part of its movement to positively close the twisting ,membersto initially position the crank, and in} another part of its movement tojactuate the twisting members and the cradles about fixed centers:

8. A crank twisting device, comprisinga plurality of twisting members positioned to receive the forged I crank, opposltely positioned cradles pivoted beyond the" ends of plurality of crank twisting members for twisting parts of the crank about certain in;-

termediate bearings ofthe crank as centers,

said members being supported and movable asvunits upon trunnions positioned in axial alignment With sald intermediate bearing.

centers and independently of and beyond the ends of the crank. p

10. A crank twisting device, comprising a plurality of crank twisting members for twisting parts of the crank about certain" V bearings ofthe crank as centers, said members being supported .and movable as units upon trunnions in'axialalignment with said bearing centers, onefsetoftrunnions carry lng twistlngmembersrotatable about certain crank bearin sand'bein ad'ustableto 'erz: a i P mit twisting of difiiere'ntfradius. V 11.In a crank twisting machine, plurality of crank twisting members formed by cranks having throws of a pivotally; connected upper and lower die members,fand means connected to'both die members andoperable to close and then os cillatetheclosed die members. in aplane at right angles t'o'the axis ofthe crank being twisted.v V v I v ,1 n a V 12. A. crank twistlng maehinec'omprising in combination a frame, a pair of each pivotally mounted upon opposite ends of the frame and extending substantiallythe length ofthe crank, crank twisting members rigidly carried by; said cradles for twisting parts of, the crank, and twisting means pivotally carriedby onefet said cradles for,

twisting anotlierpart-of thecrankg Y;

13. A crank twlstlngimachmecomprising a plural ty oftw sting members mounted to receive a crankhaving certainthrows forged ;in' the same plane and having cr nkgb i lugs and shaft bearings, two of the-twisting V V members beingfpivo'ted in axial alignment one'ofs'aid cheeks and a shaft twisting members 1 when :in clos ed'positionfor moving-said cap into clamping position on said "base;

. l7; crank twisting machine for twisting cranks and mnltipl'e'throw shafts, comiprising in combination a: twisting member igi z' egei r q j with one crank bea rin for "twistin two cheeks connected byacrankbearing, andlone ot'said two twisting members being pivoted between said two checks for further twisting bearing onthe end of the shaft. i, I

14; A crank twisting machinecomprising a plurality of twisting members for receiving and twisting certain parts of a crank shaft,,caps for said membersmovableto force thecrank into position, and means for locking said members against twisting move ment i i itil" said caps have forced thecrank 1 upper and "into position, and means for; locking said 7 members in tw sted pos t on to'finsureop'enbefore ref urn of said tw1sting' or said caps ing members.

151 A crank twisting machine comprising a traine 'having spaced end members, crank positioned between and piv0ted centrally, and at the bottom part of 22. in a crank twistin sai lend members, and tWO Shafts mollnted' at the'top of the frame, onejserving to a ituate' the other, and means connecting sa d shafts' with respective tw sting 1 members, whereby som'e members are twisted througli at s s t Others v 16 In a crank twisting machine,a crank twisting member comprising a block formed of a base-and a cap' for'clamping a portion of the crank into positionpreparatory to '5 twisting, and means pivoted to the base of the block and. below and centrally of said cap formed ota baseand'a cap therefor, a cradle for rigidly supporting said base, andineans pivotally carr-ied by saidcradl'e', and movable to position said'cap in clamping'positionon sa d base', SillClIIlflIlS" being pivotally connected to sa d cap at a point in alignment fwith saidpivot between said means and said cradle,

18 A crank twisting machine; comprising I comb nation aqplurahtyofcrank twisting, 'm'embers movable to twist portions of the crank in opposite directions, an of cradle members also movable in opposite directions V I 7 p for carrying the respective twisting. *memj to be twisted,'and means connected to'both I die members ottlietwisting' members,the I i c relative to each other wherebyto adaptsaidflconnectionbetween said means and-the ups-54120 bers, said cradle members being adjustable toriloc'king the twisting means against morement before'actuation and after *QlOSlfIlg of f said cap I in axial alignment with the crank bearing 201-111 cranz twisting'machine, a crank twisting member comprising a blockforin'ed of a base-and a cap for clamping a portion oithecrank into-position preparatory .to

twisting-means connected tosaid cap and v t after actuation.

the twisting member and forcetheflink at 0 21. :In a crank twisting machine, :atwistiiig member formed by pivotally connected lower die "members, and means; pivotally connected to both die; members, said pivotal connection "between i said means 3 andsaid iipperdie member? being by means I w of a link, said means being operable to close pastd'ead ce 'iter to positively .force the crank] intothelower dieiinember. 1 ,i

aehine, atw sting 'ineniber-formed by; p'ivotally connected upper and lower die? members, operating g *means connected to both die :members for firm closing the die "members andthen twisting'the same bytheis'ame continued movement,'the connection between'the operating means a-nd'the upper die'member being. suc as to close the twistingfmember and positive- 1y force the crank into the lower die member and ito'lock-thesame in such position during the twisting of the cralnkp I the bottom part of said, end members, motion,

translating means mounted in lating means with respectivetwisting nem twisting members to. twist cranksfor either equal-distant '7 throws or non-equidistant a ly forc ngjport ons ofgth crank to their throws. a 7 19. In a cranktwistingmachine, a crank twisting member comprising ablock formed base for first closing the cap,'andthen actuat "hers and at a point whereby to first close and e thenftwistthe twistingfinemb'ers, and said 7 j mOti'On translating means" and connecting E means being-arrangedwhereby some inembers are twisted thrc iugh' greater angles-than others. I

24. "Inacrankt'wistingmachine, a plnralityot crank twisting members h'ZLV111g'1QWGI'5-v115 di efinember's and oppositely pivoted upper .die'i'nembersto permit insertion'of the crank :pe r die member being operablefor first clo'smg the upper die member and then positive;

botton 'position fin thefilowerj the members preparatory-Tito"twisting."

mechanism comprising a pair' ofjrelatively v 'fSe'p arablefcooperating 'elenientsone pivota'l'ly p p i -"carriedfby' the other,{bearing meanspermit- 1 I ing-the complete twisting means, and'means ting'nnierotatienefsaid element'syandameans 3 23} A cranktwisting'machine 'comprisiiigag pg c h l p fi the @105 frame, means connecting said motion. ti'-ansautomatically operating on said elements to firstcause their relative movement to clamp a crankshaft throw and to second-cause unit' rotation of said elements to thereby twist said 13l1I'OW; 1 p

26. A crankshaft twisting machine comprising holding means 'for a crankshaft and .twisting means for angularly swinging a 27. A *crankshafttwisting machine 'co1npr1s1ng holdlng means for a crankshaft and twisting means, for angularly swinging a throw ofsaid crankshaft said means includ jzing a rotatable clamping twisting element, a

' cooperating clamping twisting element, a lever pivoted to the first element andconnected to actuate the second elementjand power Vmeansacting 011 said lever to first'move the second element into clamping relation with the first element and thento rotate both of said elementsas aunith t V V 28. Crankshaft twisting mechanism includ 7 means for clamping jsaid outer short cheek,

necting means ,for said elements permitting their, combined rotation I and relative moveing a first element a second element, and conment toward or from each other, power means, means connecting the powermeans andsa d mechanism to'rotate said elements togetherin opposite directions,- saidjpower meanswhenactingin one direction serving to first move said elementsrelatively 1 toward eachotherfand then to rotate said elements together. 5 .v

; 29. Crankshaft twisting mechanism includingia first element, a second element; and connecting' means for said elements permitting I V twisting unit supported by the'said main unit :1 their combined rotation and relative move- I the crank aboutcertain intermediatebearings -of. the crank as, centers, saidmembers being' supported andmovable as a'unit upon trun-f nionspositioned inaXial alignment withsaid L, intermediate bearing centers; and independ .ment toward or from each' 'other, power means, means connecting the power means and said. mechanism to rotate saidielements' together in oppos te d1rect1ons,.sa1d power" means whenacting in one direction'clserving wto first'move said elements relatively from each other and; then'fto rotate said elements. v

'30. A crank twistlng device, comprising,

cranktwisting members for twisting partsof ently of and beyond the endsofthecrank.

31. Crankshaft twistin'gmechanism inclu'dj I ing a first elementya second'ele1nent,iand con- V ,nectin'g means. for said.elementspermitting their combined rotation and relative; ov 11 ment towardor from each other,-power means; means connecting the power fmeans' ;j

element with the second g V p 7 :the crank being twisted. 7

n I In testimony imam-r the opposite direction serving toifirst move said elementsrelativelyyfrom each other and then to rotate said elements. 1 V V r 32; In a crank twisting machine, a crank twisting devicelformed by pivotally connected upper and lower die members, and means connected to both die members and operable to close andthen oscillatethe closed'die members in aplane at right angles to. the axis of ing carried'by an'outer short cheeky twocrank bearings connected by a slngle :cheek, a short 3Q crank twisting machine for twisting 1 cranks of the type having an end shaft bearcheekand an inner shaft bearing out of al-ignmentwith said end shaft bearing,icomprising a holding member for stationarily clamping the innershort cheek, a twistlng unit mounted for rotation abouta fixed aims for generally cheek,- crank bearing, and connecting cheek about the other crank bearlng, and a memv -r 7 twisting said end shaft bearlng, outer short ber carried by said twisting-unithaving i member being bodily movable relative o said twlsting unit for po'sltlon ng sa d end cranksof the type having an end shaft bear- :ing carried by a short: cheek andftwo' crank bearings; directly connected j by a relatively 7 long cheek comprising means for: clamping the crank in such a manner as to hold the innermost ofsaidc rank bearings stationary, a main :tw stmg unit mounted for rotation abouta fixed axis andan'auxillarylclampmg for clamping said short cheek to effect twisting of the end. shaft bearing, said member being so supported by said unit as" to bejb'odily' movable relative thereto during partjof the twisting action,- f i a whereof I" affixmy signature. 

